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(No Model) 4 Sheets-Sheet 1.

J. LAIDLAW.

QENTRIFUGAL MACHINE.

No. 319,498. Patented June 9, 1885.

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J. LAIDLAW.

GENTRIFUGAL MACHINE.

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4 Sheets-Sheet 2.

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' No. 319,493. Patented June 9, 1885.

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(No Model.) 4 SheetsSheet 4.

J. LAIDLAW.

OENTRIFUGAL MAOHINE. No. 319,493. Patented June 9, 1885.

' fly UNITED STATES PATENT 01mins,

JOHN LAIDLAWV, OF GLASGOIV, COUNTY OF LANARK, SCOTLAND.

CENTRIFUGAL MACHINE.

SPBGIPIGATION forming part of Letters Patent No. 319,493, dated June 9,1885.

Application filed April 29, 1885. (No model.)

5 Lanark and Renfrew, North Britain, engneer,

have invented Improvements in Centrifugal Machines, otherwise known ashydroextractors, of which the following is a specification.

This invention relates to improvements in centrifugal machines,otherwise known as hydro-extractors, and has for its object to provide arevolving bearing for such centrifugal machines or hydroextractorswhereby the friction encountered in driving such ma- 1 5 chines isconsiderably less than the friction encountered by the bearings hithertoused for the purpose.

In applying these improvements to that class of centrifugal machines orhydro-extractors in g which the basket is carried upon a hollow verticalshaft which is supported upon and is rotated around a suspendedstationary shaft there is arranged one set or tier, or two or more suchsets or tiers, of rollers of truncated. conical form betweencorrespondingly=coned rings or washers, the whole being situated aroundthe inner stationary shaft and within the outer rotating shaft. For abearing for supporting a vertical rotating shaft at itslower extremitythe rolh c; ers, which may be in one, two, or more tiers,

are arranged around a short vertical shaft or plug, and the whole of thebearing-surfaces within an oil-containing vessel.

Figurelis in part an elevation and in part a vertical sect-ion ofportion of an elasticallysuspended centrifugal machine orhydro-extractor, showing the application thereto of a bearingconstructed according to and constituting this present invention. Figs,2 and 3 are respectively avertical and a horizontal or transversesection through the said bearing, and represented at these figures uponan enlarged scale. Fig. 4 is a vertical section through this improvedbearing as applied to a centrifugal machine, the rotatingshaft of whichis supported from below.

In constructing a bearing according to this presentinventionforavertically-suspended ro tating tubular shaft such as is represented ata,

Figs. 1, 2, and 3 of the annexed drawings, the

conical rollers?) are arranged with their axes, and consequently theirperipheries, upon lines radiating to a point in the axis of thestationary shaft 0. Each of these rollers I), as shown, presents atruncated conical appearance, and the inner and outer extremities arespherical. The rollers b are arranged around the shaft 0 in such.number, and they are of such proportions, that their peripheries arepreferably c'ontiguous, or as nearly so as is practicable;

When two sets or tiers of rollers b are used, as represented at Fig. 2of the annexed draw ings, the said tiers of rollers rotate between therings d and Z and e and Z, respectively, the bearing-surfaces of theserings being in planes radiating from the points to which the axes of therespective tiers of rollers radiate. The outer faces of the rings (1 ande are made convex, and with these convex faces the opposing concavefaces of the gun-metal or equivalent collars f engage. To the outerrounded extremities of the rollers b the annular convex surfaces of therings 9 are presented. The lower of the two collars f is supported uponthe nut h, which isscrewed upon the stationary shaft 0, while the upperof these collars f directly supports the gun metal or equiva lent bushi. This bush z is secured to the rotating shaft a by means of the pin7', which is passed tangentially therethrough. The locknut is is screwedupon the shaft 0, in order to prevent the nut h from coming off orotherwise shifting by vibration.

The bearing hereinbefore described has been mentioned as having two setsor tiers of rollers b,- but it is to be understood that one, or three,or more such sets or tiers maybe used.

At Fig. 4 of the annexed drawings there is represented a bearing havingone set or tier of rollers b as applied to that class of centrifugalmachines or hydro-extractors in which the baskets are carried uponvertical shafts supported at theirlower extremities. In this form ofbearing where one set or tier of rollers b is used the said rollers andrings d, e, and g are arranged in the manner hereinbefore described withreference to Figs. 1, 2, and 3 of the annexed drawings. The collars m,Fig. 4, have each a hole formed at its center, which holes admit thelower one of the short shaft or plug a, and the upper one of the pin orplug opassing therethrough. The short shaft or plug it serves tomaintain the lower collar m. and the rings d and e in their centralposition, while the pin or plug 0, which is formed upon the lowerextremity of the rotating shaft 2, serves to maintain the upper collar min position. The shaft 0 is guided in the tube q, the internal diameterof whose lower extremity is preferably reduced, as represented at Fig.4; so as to embrace the rollers b and their directly connected parts.The cap r is preferably provided with the lugs 8, whereby the said cap1* is screwed tightly upon the tube q, and there by constitutes a closedvessel for containing the oil necessary for lubricating the rolling orfriction surfaces of the bearing, the holes 25 and channels a beingrespectively provided for the passage and circulation of the oil to suchsurfaces.

JOHN LAIDLAW.

Witnesses:

Sr. J OHN VINCENT DAY, HENRY HART,

Both of 115 St. Vincent Street, Glasgow.

